smt eeprom suggestion?

electromanj

Hello all. Does anyone have a suggestion for an smt eeprom that is compatible with the Propeller?

I'm a little hesitant about this one http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/eeprom/List/0/SortField/4/ProductID/579/Default.aspx

Not sure what package that is, but looking at it on my Prop proto boards it looks a little tiny for me to hand solder. Is there a smt size eeprom comparable to the P8X32A 44 QFP package that would work?

Thanks for any help.....

traVis

doggiedoc

I have some of those I got for bare Schmart Boards I bought at fry;s a while back. They are tiny.

I managed OK, but I need to try again with my new headgear! LOL

The 44 QFP prop is huge compared to that EEPROM.

Paul

Rayman

I use a rather big smt eeprom: 24FC512-I/SN

I used a different one in the past, but it became obsolete...
Parallax does use the tiny ones, which I don't completely understand...
But, this one is easy to solder and works perfectly with the Prop.

electromanj

Thank You. That looks like something I can handle. Looks like that one is 64 KB?

traVis

Duane Degn

I tried to find some of the 64K EEPROM I've purchased from Digi-Key in the past but they don't stock them any more.

They do stock Rayman's suggestion. (Yes, it's 64KByte, or 512Kbit hence the 512 in the product name. 32KByte EEPROM often have a 256 in the product name.)

doggiedoc

traVis - did you see these. It's what I was talking about.

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/schmartboard/List/0/SortField/4/ProductID/568/Default.aspx

doggiedoc

Here is a pic of one for size reference.

electromanj

Thanks for the link and pics Doc.
Duane that clears that up nicely... I was wondering about the 512. Bit vs Byte gotcha.

traVis

Duane Degn

doggiedoc wrote: »

Here is a pic of one for size reference.

I'm pretty sure that size is referred to as TSSOP (Thin Shrink Small-Outline package). I wonder why the TSSOP chip costs so much less than the SOIC chip?

A lot of Parallax's Propeller boards use the TSSOP size of EEPROM.



If you want to get adventurous, you can add a second EEPROM on top of the original for expanded EEPROM storage. Just pull-up one of the address pins (I broke off pin 1 in my first attempt, good thing they're internally pulled-down).